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U.S. ZIP Code 51301
5-digit United States postal code #51301, Spencer, IA
ZIP code 51301 is located in the city (place name) Spencer, сounty Clay in the state of Iowa. The population in ZIP code 51301 is 12691 and the population density is 31.4. ZIP code 51301 refers to сounty Clay having сounty FIPS 19041, the ratio of people from different counties in this ZIP code is as follows: all county weights - 19041: 100%. In the area of the ZIP code 51301 valid time zone America/Chicago.